Clock



FIG. 1 is a front view of a clock.

FIG. 2 is a rear view thereof.

FIG. 3 is a top view of the clock shown in a different position;

FIG. 4 is a bottom view of FIG. 1;

FIG. 5 is a perspective view thereof in a first open position.

FIG. 6 is a perspective view thereof in a second open position; and,

FIG. 7 is a perspective view thereof in a closed position.

The ornamental design for a clock, as shown and described. 